Natural Selection: Sex Ratio

Abstract

Natural selection acts strongly on the proportional numbers of male and female offspring among the progeny of adults. The
equilibrium is often one at which males and females are produced in roughly equal numbers, but under certain ecological and
genetic circumstances there may be dramatic population‐wide biases, and even in populations with balanced sex ratios, parents
are often selected to produce strongly male‐ or female‐biased progenies in response to variations in their individual condition.

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